Melt and fuse comprising same

Abstract

Provided are a melt and a fuse comprising the same, the melt comprising N groups of narrow diameter surfaces, N being an integer greater than or equal to 2 and less than or equal to 10, each narrow diameter surface comprising at least one narrow diameter. All the narrow-diameter surfaces in each group of narrow-diameter surfaces are parallel to one another; the N groups of narrow-diameter surfaces are circularly arranged according to the sequence from the first group to the Nth group; wherein the first group of narrow-diameter surfaces comprises at least two narrow-diameter surfaces, and the second group of narrow-diameter surfaces to the Nth group of narrow-diameter surfaces comprise at least one narrow-diameter surface; the included angle between every two adjacent narrow-diameter faces ranges from 90 degrees to 150 degrees. Therefore, the directions of the arcs of each group of adjacent narrow-diameter surfaces are different, the space is saved, the possibility that the arcs of all fractures are connected in series and interfered with each other is obviously reduced, and the breaking capacity of the fuse under a high-voltage condition is improved. The method is especially suitable for a large-arc-front I2T melt scheme such as a copper melt and the like, and can effectively solve the problem of breaking of high-voltage and small-size fuses.

Description

Technical Field

[0001] The utility model belongs to the field of fuses, and in particular relates to a fuse and a fuse containing the fuse. Background Art

[0002] The statements in this section are only intended to provide background information related to the present invention to help understand the present invention. Such background information does not necessarily constitute prior art.

[0003] With the development of the photovoltaic energy storage industry, higher requirements are placed on the reliability and safety of the power system, especially the increasingly higher voltage level requirements for fuses. The increase in voltage level poses a severe challenge to the effective breaking capacity of fuses. The higher the voltage level, the greater the difficulty the fuse faces during the breaking process, especially under high voltage conditions, the breaking performance of the fuse will be significantly affected.

[0004] In order to cope with the breaking difficulties caused by high voltage, a common method is to increase the number of rows of fuse breaks, that is, to increase the length of the fuse to improve the breaking capacity. However, in a limited space, the effect of this method is limited, and effective breaking of high voltage becomes more difficult. Especially for copper fuses, due to the high electrical conductivity and thermal conductivity of copper, its breaking capacity under high voltage is more limited, and it is difficult to meet the needs of practical applications. At present, the voltage of photovoltaic fuses has reached 1500VDC. By increasing the number of rows of fuse breaks, that is, increasing the length of the fuse, high voltage can be broken, but in a limited space, it is more difficult to effectively break high voltage. Especially for copper fuses, the ability to break high voltage is even more difficult.

[0005] In addition, the existing fuse design is prone to arc interference under high voltage conditions, which not only affects the breaking effect of the fuse, but may also cause equipment damage and safety accidents. Therefore, how to achieve effective breaking of high voltage in a limited space while avoiding arc interference has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] In view of the above problems in the prior art, the utility model innovatively provides a fuse structure, which aims to effectively prevent the arcs at each break from interfering with each other, thereby improving the breaking capacity of the fuse under high voltage conditions. This design is particularly suitable for large arc front I 2 The T (i.e., the energy accumulated from the beginning of the fuse melting to the formation of the arc) fuse solution can effectively solve the problem of breaking high-voltage, small-size fuses.

[0007] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a melt, including N groups of narrow diameter surfaces, N is an integer greater than or equal to 2 and less than or equal to 10, each narrow diameter surface includes at least one narrow diameter; all narrow diameter surfaces in each group of narrow diameter surfaces are parallel to each other; the N groups of narrow diameter surfaces are cyclically arranged in the order of the first group to the Nth group; wherein the first group of narrow diameter surfaces includes at least two narrow diameter surfaces, and the second group of narrow diameter surfaces to the Nth group of narrow diameter surfaces include at least one narrow diameter surface; wherein two adjacent narrow diameter surfaces are connected, and the angle between two adjacent narrow diameter surfaces is 90-150 degrees.

[0008] In some embodiments, N is equal to 2, and the number of narrow-diameter surfaces in the first group of narrow-diameter surfaces and the number of narrow-diameter surfaces in the second group of narrow-diameter surfaces are both less than or equal to 10.

[0009] In some embodiments, the first group of narrow diameter surfaces includes a first narrow diameter surface and a third narrow diameter surface that are parallel to each other, and the second group of narrow diameter surfaces includes a second narrow diameter surface, which is located between the first narrow diameter surface and the third narrow diameter surface and connected to the first narrow diameter surface and the third narrow diameter surface.

[0010] In some embodiments, the melt further includes a non-narrow diameter surface, and the non-narrow diameter surface is provided at both ends of the melt for electrically connecting to components outside the melt.

[0011] In some embodiments, the narrow diameter surface includes a narrow diameter.

[0012] In some embodiments, the one narrow diameter is located in the middle of the narrow diameter surface.

[0013] In some embodiments, bending portions are included between adjacent narrow diameter surfaces of the melt and between a narrow diameter surface and a non-narrow diameter surface, for bending the melt to form corresponding angles.

[0014] In some embodiments, the angle between adjacent narrow diameter surfaces is 120 degrees.

[0015] In some embodiments, the at least one narrow path has a width of 0.15-0.5 mm.

[0016] A second aspect of the present disclosure provides a fuse, comprising: at least one fuse as described above, and a first terminal piece and a second terminal piece electrically connected to both ends of the fuse.

[0017] The fuse provided in the utility model divides the narrow diameter surface into two or more parallel surfaces, which helps to save space and makes the arc directions generated by the narrow diameters of adjacent narrow diameter surfaces different, avoiding the possibility of arcs connecting and interfering with each other, and improving the breaking capacity of the fuse under high voltage conditions. This design is particularly suitable for large arc front I 2 The T fuse solution can effectively solve the problem of breaking high-voltage and small-sized fuses. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A side view of a melt structure commonly used in the prior art is shown.

[0019] Figure 2 A schematic diagram of a melt according to an embodiment of the present invention is shown.

[0020] Figure 3 Shows Figure 2 Side view of the melt.

[0021] Figure 4 A schematic diagram of a melt according to another embodiment of the present invention is shown.

[0022] Figure 5 A schematic diagram of a melt according to another embodiment of the present invention is shown.

[0023] Figure 6 A schematic diagram of a fuse according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model will be further described in detail through specific embodiments in conjunction with the accompanying drawings. It should be noted that the embodiments given in the utility model are only for illustration and do not limit the protection scope of the utility model.

[0025] Figure 1 FIG. 2 shows a side view of a melt structure commonly used in the prior art. Figure 1 As shown, the fuse includes a plurality of narrow diameter surfaces on the same plane, and each narrow diameter surface includes at least one narrow diameter. In this embodiment, in order to achieve effective disconnection of small-sized fuse products at high voltage levels, arc extinguishing needs to be designed. In the fuse, arc extinguishing is mainly achieved by lengthening the arc. The inventors found in their research that the existing fuse design method designs the narrow diameter surfaces on the same plane. When a large current passes through, it is assumed that the narrow diameters of each narrow diameter surface are disconnected at the same time to form a fracture, and the voltages of each fracture are equal. The arcs generated by each fracture are on the same plane, and the arc lengths are equal. When the arc length is not enough to extinguish the arc, the arcs will interfere with each other, resulting in a disconnection failure. Therefore, there is a need for a fuse structure that can effectively achieve fuse disconnection at high voltage levels and within a limited space.

[0026] Figure 2 A schematic diagram of a melt according to an embodiment of the utility model is shown, Figure 3 Shows Figure 2 A side view of the melt. Figure 2 and Figure 3As shown, the melt 100 is a sawtooth structure, which includes three narrow diameter surfaces 101, 102, 103, and non-narrow diameter surfaces 110, 107, 104, 108, 109. Among them, in the present utility model, the narrow diameter surface is a surface including the narrow diameter, and the non-narrow diameter surface is a surface not including the narrow diameter. In this article, "narrow diameter" refers to a narrowed portion on the melt, and the narrowed portion has a width narrower than other parts along the length direction of the melt. Usually, the non-narrow diameter surface is located at both ends of the melt, and is used to connect (for example, weld) the melt to the first terminal piece and the second terminal piece (at the ends of the fuse) at the two ends of the fuse. Figure 6 In one embodiment, the narrow diameter surface includes a narrow diameter, and the narrow diameter is located in the middle of the narrow diameter surface. In one embodiment, the narrow diameter surface includes at least one narrow diameter.

[0027] like Figure 2 and Figure 3 As shown, the narrow surface 101 is parallel to the narrow surface 103, and the narrow surface 102 is connected to the narrow surfaces 101 and 103. In this embodiment, the narrow surfaces are creatively divided into two groups of parallel surfaces (wherein the first group of narrow surfaces includes the narrow surfaces 101 and 103 which are parallel to each other, and the second group of narrow surfaces includes the narrow surface 102), so that the arcs generated at the narrow points on adjacent narrow surfaces have different directions, thereby avoiding the possibility of arcs connecting to each other. Figure 2 and Figure 3 The narrow diameter of the middle narrow diameter surface 102 and the narrow diameters of the two side narrow diameter surfaces 101 and 103 are not on the same plane, and there is a certain angle between them. When a large current passes through, assuming that the narrow diameters are disconnected at the same time to form multiple fractures, the voltage of each fracture is equal, and the arc in the middle part is different from the arc starting and arc pulling directions of the two side narrow diameters located in other different planes, which effectively avoids the arcs of two adjacent narrow diameters from being connected in series and interfering with each other on the same plane, and the arc can be effectively disconnected at this time.

[0028] In one embodiment, the angle between any intersecting narrow-diameter surfaces is 90-150 degrees. For example, the angle α1 between the narrow-diameter surface 101 and the narrow-diameter surface 102 and the angle β1 between the narrow-diameter surface 102 and the narrow-diameter surface 103 are 90-150 degrees. Too large an angle may reduce space utilization, which is not conducive to saving space; while too small an angle may increase the risk of arc connection between adjacent narrow-diameter surfaces, thereby causing unnecessary interference.

[0029] In one embodiment, each of the narrow diameter surfaces 101 , 102 , 103 has at least one narrow diameter 105 .

[0030] like Figure 2 and Figure 3 As shown, since the narrow surface 101 and the narrow surface 103 are parallel to each other, the angle β1 is equal to the angle α1. For example, when the angle α1 is 100 degrees, the angle β1 is also 100 degrees.

[0031] In some embodiments, the size of the narrow surface is determined according to design requirements. For example, the size of the narrow surface 101 can be larger than, equal to, or smaller than the narrow surface 102 .

[0032] In some embodiments, the angle between the narrow diameter surface and the non-narrow diameter surface is 90-150 degrees. Figure 2 or Figure 3 As shown, the angle between the narrow diameter surface 101 and the non-narrow diameter surface 107 and the angle between the narrow diameter surface 104 and the non-narrow diameter surface 108 are both 90-150 degrees. Such a design is conducive to saving space and improving space utilization.

[0033] In some embodiments, the angle between the non-narrow diameter surfaces is also 90-150 degrees. Specifically, Figure 2 As shown, the angle between the non-narrow diameter surface 110 and the non-narrow diameter surface 107 and the angle between the non-narrow diameter surface 109 and the non-narrow diameter surface 108 are also 90-150 degrees.

[0034] In some embodiments, the number and size of the non-narrow diameter surfaces are determined according to design requirements. For example, the non-narrow diameter surfaces connected to the left side of the narrow diameter surface 101 may be one or more, and the non-narrow diameter surfaces connected to the right side of the narrow diameter surface 103 may also be one or more. The specific size of the non-narrow diameter surface is determined according to design requirements so that it can be respectively connected to the first terminal piece and the second terminal piece of the fuse (in Figure 6 ) electrical connections.

[0035] In some embodiments, the material of the fuse 100 is at least one of gold, silver, copper or other conductive metals or alloys. This ensures that the fuse 100 can be effectively disconnected under high voltage and high current conditions, has good electrical conductivity and thermal conductivity, and improves the reliability and safety of the fuse.

[0036] In some embodiments, the narrow diameter and its respective narrow diameter surface are integral and have the same thickness. Figure 1 As shown, the narrow diameter 105 and the narrow diameter surface 101 to which it belongs are integral and have the same thickness.

[0037] In some embodiments, a bending portion 106 is included between the narrow diameter surfaces of the melt and between the narrow diameter surfaces and the non-narrow diameter surfaces for bending the melt, thereby forming Figure 2 Angle shown.

[0038] In some preferred embodiments, the angle between adjacent narrow-diameter surfaces is 120 degrees. In a limited space, the angle of 120 degrees can maximize the use of space, making the layout between the narrow-diameter surfaces more compact and reasonable. This design helps to reduce the volume and weight of the fuse and improve its integration and applicability.

[0039] In some embodiments, Figure 2 As shown, the width d of the narrow path 105 is 0.15-0.5 mm. The width d of the narrow path directly affects the current passing capacity. When the width d is in the range of 0.15-0.5 mm, the narrow path 105 can reach the fusing temperature faster under high current, thereby improving the fusing efficiency.

[0040] In this embodiment, the narrow diameter surface of the melt is divided into two groups of parallel surfaces at an angle to each other, so that the arc directions of adjacent narrow diameters are different, avoiding the possibility of arcs connecting each other. The narrow diameter structure design with a middle protrusion makes it possible for the narrow diameter of the middle narrow diameter surface to generate an arc, and the arc distance from the narrow diameters of the narrow diameter surfaces on both sides is far enough, eliminating the mutual influence of the arcs, thereby effectively breaking. In addition, due to the bending angle, this solution can be used without increasing the fuse tube number.

[0041] Although only three narrow-diameter surfaces are shown in the above embodiment, those skilled in the art should understand that more narrow-diameter surfaces may be included in actual applications.

[0042] Figure 4 FIG. 2 shows a schematic diagram of a melt 300 according to another embodiment of the present invention. Figure 4 As shown, the melt 300 includes a first group of mutually parallel narrow diameter surfaces 311, 313, 315, 317, 319 and 321, and a second group of mutually parallel narrow diameter surfaces 312, 314, 316, 318 and 320. The two groups of narrow diameter surfaces are arranged cyclically from the first group to the second group, that is, the arrangement order is: the first group (narrow diameter surface 311), the second group (narrow diameter surface 312), the first group (narrow diameter surface 313), the second group (narrow diameter surface 314) ..., and so on. Among them, two adjacent narrow diameter surfaces are connected, and the angle between the two adjacent narrow diameter surfaces is 90-150 degrees.

[0043] The narrow surface 311 intersects with the narrow surface 312, the narrow surface 312 intersects with the narrow surface 313, the narrow surface 313 intersects with the narrow surface 314, and the angle is α2, the narrow surface 314 intersects with the narrow surface 315, and the angle is β2, the narrow surface 315 intersects with the narrow surface 316, and the angle is γ2. Obviously, the angles α2, β2 and γ2 are equal. Similarly, the angle between the narrow surface 316 and the narrow surface 317 is also equal to the above-mentioned angles α2, β2 and γ2, and so on, which will not be repeated here.

[0044] Although in the above embodiment, each narrow diameter surface includes one narrow diameter 105, those skilled in the art should understand that more narrow diameters may be provided based on the needs of practical applications.

[0045] Although in the above embodiment, the first group of narrow diameter surfaces includes 6 narrow diameter surfaces and the second group of narrow diameter surfaces includes 5 narrow diameter surfaces, the present invention is not limited thereto, and the number of narrow diameter surfaces can be set as needed in actual applications. In some embodiments, the number of narrow diameter surfaces in the first group of narrow diameter surfaces and the second group of narrow diameter surfaces is less than or equal to 10.

[0046] In this embodiment, the narrow diameter surface of the melt is divided into two groups of parallel surfaces at an angle to each other, so that the arc directions of adjacent narrow diameters are different, avoiding the possibility of arcs connecting each other. The narrow diameter structure design with a middle protrusion makes it possible for the narrow diameter of the middle narrow diameter surface to generate an arc, and the arc distance from the narrow diameters of the narrow diameter surfaces on both sides is far enough, eliminating the mutual influence of the arcs, thereby effectively breaking. In addition, due to the bending angle, this solution can be used without increasing the fuse tube number.

[0047] Although only two sets of mutually parallel narrow diameter surfaces are shown in the above embodiment, for example Figure 3 In the embodiment, the first group of narrow-diameter surfaces includes narrow-diameter surfaces 101 and 103 which are parallel to each other, and the second group of narrow-diameter surfaces includes narrow-diameter surface 102; Figure 4 In the embodiment, the first group of narrow diameter surfaces include mutually parallel narrow diameter surfaces 311, 313, 315, 317, 319 and 321, and the second group of narrow diameter surfaces include mutually parallel narrow diameter surfaces 312, 314, 316, 318 and 320. However, those skilled in the art should understand that more groups of mutually parallel narrow diameter surfaces may be included in practical applications.

[0048] Figure 5 FIG. 2 shows a schematic diagram of a melt including three groups of narrow diameter surfaces according to another embodiment of the present invention. In this figure, non-narrow diameter surfaces are omitted. Figure 5 As shown, the melt 400 includes a first group of mutually parallel narrow diameter surfaces 411 and 414, a second group of mutually parallel narrow diameter surfaces 412 and 415, and a third group of mutually parallel narrow diameter surfaces 413 and 416. The three groups of narrow diameter surfaces are arranged cyclically from the first group to the third group, that is, the arrangement order is: the first group (narrow diameter surface 411), the second group (narrow diameter surface 412), the third group (narrow diameter surface 413), the first group (narrow diameter surface 414), the second group (narrow diameter surface 415), and the third group (narrow diameter surface 416). Among them, two adjacent narrow diameter surfaces are connected, and the angle between the two adjacent narrow diameter surfaces is 90-150 degrees.

[0049] Specifically, the angle α3 between the narrow diameter surface 411 and the narrow diameter surface 412 is 90 degrees, the angle β3 between the narrow diameter surface 412 and the narrow diameter surface 413 is 120 degrees, the angle γ3 between the narrow diameter surface 413 and the narrow diameter surface 414 is 150 degrees, the angle δ3 between the narrow diameter surface 414 and the narrow diameter surface 415 is 90 degrees, and the angle θ3 between the narrow diameter surface 415 and the narrow diameter surface 416 is 120 degrees.

[0050] In this embodiment, the narrow diameter surface of the melt is divided into three groups of parallel surfaces at an angle to each other, so that the arc directions of adjacent narrow diameters are different, avoiding the possibility of arcs connecting each other. The narrow diameter structure design with a middle protrusion makes it possible for the narrow diameter of the middle narrow diameter surface to generate an arc, and the arc distance from the narrow diameters of the narrow diameter surfaces on both sides is far enough, eliminating the mutual influence of the arcs, thereby effectively breaking. In addition, due to the bending angle, this solution can be used without increasing the fuse tube number.

[0051] Likewise, in practical applications, more groups of mutually parallel narrow-diameter surfaces may be included, and each group of narrow-diameter surfaces may include more narrow-diameter surfaces.

[0052] Therefore, the utility model provides a melt, which includes N groups of narrow diameter surfaces, N is an integer greater than or equal to 2 and less than or equal to 10, each narrow diameter surface includes at least one narrow diameter; all narrow diameter surfaces in each group of narrow diameter surfaces are parallel to each other; the N groups of narrow diameter surfaces are cyclically arranged in the order of the first group to the Nth group; wherein the first group of narrow diameter surfaces includes at least two narrow diameter surfaces, and the second group of narrow diameter surfaces to the Nth group of narrow diameter surfaces include at least one narrow diameter surface; wherein two adjacent narrow diameter surfaces are connected, and the angle between two adjacent narrow diameter surfaces is 90-150 degrees.

[0053] In the present invention, arranging in a cyclic order from the first group to the Nth group means that the arrangement order is the first group, the second group...the Nth group, the first group...and so on.

[0054] In this embodiment, the narrow diameter surface of the melt is divided into two or more parallel surfaces at an angle to each other, so that the arc directions of adjacent narrow diameters are different, avoiding the possibility of arcs connecting each other. The narrow diameter structure design with a middle protrusion makes it possible for the arcs of the narrow diameter surface of the middle narrow diameter surface to be far enough away from the arcs of the narrow diameter surfaces on both sides when the arc is generated, eliminating the mutual influence of the arcs, thereby effectively breaking the arcs. In addition, due to the bending angle, this solution can be used without increasing the fuse tube number.

[0055] In this document, "parallel" of two planes includes approximately parallel, that is, the angle between the two planes is between ±10°.

[0056] The utility model also provides a fuse. Figure 6 FIG. 1 is a schematic diagram of a fuse according to an embodiment of the present utility model. Figure 6As shown, the fuse 500 includes two fuses 501 connected in parallel to each other and a housing 504, and the housing 504 is used to enclose the fuse 501. The fuse 500 also includes a first terminal piece 502 and a second terminal piece 503 electrically connected to both ends of the housing 504, and a filling material 505 arranged in the housing 504, wherein the two fuses 501 are electrically connected to the first terminal piece 502 and the second terminal piece 503 in a manner well known to technicians. For the sake of clarity, two fuses 501 are schematically shown in the housing 504, but the connection parts thereof with the first terminal piece 502 and the second terminal piece 503 are not shown. The structure of the fuse 501 of this embodiment is the same as the structure of the fuse introduced in the above-mentioned embodiment, and will not be repeated here.

[0057] Specifically, the filling material 505 may be quartz sand for arc extinguishing, or a mixture of quartz sand and silicate binder.

[0058] Those skilled in the art can set the number of fuses 501 included in the fuse 500 of the embodiment of the utility model according to the rated current requirement. The fuse 500 includes at least one fuse 501 .

[0059] In the utility model, the new fuse is used to make the arc directions of adjacent narrow diameter surfaces in the fuse different, save space, significantly reduce the possibility of arc connection and interference between the fractures, and improve the breaking capacity of the fuse under high voltage conditions. It is particularly suitable for large arc front I 2 The T fuse solution can effectively solve the problem of breaking high-voltage and small-sized fuses.

[0060] The fuse and the fuse of the utility model can be applied in traditional industry, new energy and energy storage industries.

[0061] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein, but also includes various changes and modifications without departing from the scope of the present invention.

Claims

1. A melt, characterized in that: It includes N groups of narrow diameter surfaces, where N is an integer greater than or equal to 2 and less than or equal to 10, and each narrow diameter surface includes at least one narrow diameter; All the narrow-diameter faces in each set of narrow-diameter faces are parallel to each other; The N groups of narrow diameter surfaces are cyclically arranged in the order of the first group to the Nth group; The first group of narrow-diameter surfaces includes at least two narrow-diameter surfaces, and the second group of narrow-diameter surfaces to the Nth group of narrow-diameter surfaces include at least one narrow-diameter surface; Wherein, two adjacent narrow-diameter surfaces are connected, and the angle between the two adjacent narrow-diameter surfaces is 90-150 degrees.

2. The melt according to claim 1, characterized in that N is equal to 2, and the number of narrow-diameter surfaces in the first group of narrow-diameter surfaces and the number of narrow-diameter surfaces in the second group of narrow-diameter surfaces are both less than or equal to 10.

3. The melt according to claim 2, characterized in that The first group of narrow diameter surfaces includes a first narrow diameter surface and a third narrow diameter surface that are parallel to each other. The second group of narrow diameter surfaces includes a second narrow diameter surface that is located between the first narrow diameter surface and the third narrow diameter surface and is connected to the first narrow diameter surface and the third narrow diameter surface.

4. The melt according to any one of claims 1 to 3, characterized in that The melt further comprises a non-narrow diameter surface, which is arranged at two ends of the melt and is used for being electrically connected to components outside the melt.

5. The melt according to claim 1, characterized in that The narrow diameter surface includes a narrow diameter.

6. The melt according to claim 5, characterized in that The one narrow diameter is located in the middle of the narrow diameter surface.

7. The melt according to claim 4, characterized in that Bending portions are provided between adjacent narrow diameter surfaces of the melt and between a narrow diameter surface and a non-narrow diameter surface, and are used for bending the melt to form corresponding angles.

8. The melt according to claim 1, characterized in that The included angle between adjacent narrow diameter surfaces is 120 degrees.

9. The melt according to any one of claims 1 to 3, characterized in that The width of the at least one narrow path is 0.15-0.5 mm.

10. A fuse, characterized in that: include: At least one fuse according to any one of claims 1 to 9, and a first terminal piece and a second terminal piece electrically connected to both ends of the fuse.

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